INN THE MONEY: Ben Novack Jr., with wife Narcy (above), was slain at the Hilton Rye Town, allegedly by thugs she conspired with. His fortune came from Fontainebleau owner Ben Sr. in the Miami hotel's '60s heyday with Eddie Fisher and Connie Stevens. Photo: AP

She opened the door for her husband’s killers. She helped them bind him with duct tape. Then, when his protests in a Westchester hotel suite grew too loud, she callously handed them a pillow to muffle his final screams.

Federal prosecutors made those accusations yesterday as they unsealed an indictment against stripper-turned-millionaire Narcy Novack — describing her as an ice-blooded killer who plotted, joined in on, and then hoped to reap a fortune from the bludgeoning death of her wealthy husband.

Novack, still surgically sultry at 53, was so cavalier in her brutality that when her spouse drew his last breath, she snatched his bracelet — which spelled his name, “B-E-N,” in diamonds — and tossed it to one of the killers as a keepsake, prosecutors charged as she was hauled into federal court in her hometown of Fort Lauderdale, Fla.

“She opened the door for the attackers and during the assault, went so far as to provide them with a pillow to place over her husband’s face as he was being beaten to death,” US Attorney Preet Bharara said of Novack after the indictment was unsealed in White Plains.

Ben Novack Jr., 53, had been discovered dead in the bedroom of his suite at the Hilton Rye Town almost a year ago, on July 12, 2009.

His original fortune came from his father, Ben Sr., the founder of Miami’s Fontainebleau hotel.

But by the time of his death, Ben was worth some $10 million. He owned several homes, valuable life-insurance policies, boats, a lucrative convention-management company and one of the largest collections of Batman memorabilia in the world.

And, according to Florida investigators and documents in the heated battle over his will, Ben was also cheating on his wife of 18 years, Narcy Cira Veliz Pacheco from Hialeah, Fla.

Narcy knew her husband had strayed, and feared the worst — that he’d dump her and leave her almost penniless, with little more than the $65,000 payout specified in their prenup, his relatives claim in will-related documents.

Meanwhile, she was the sole beneficiary of his estate. Divorced, he was worth nothing to her. Dead, he was worth seven figures.

Prosecutors said Narcy plotted for more than a month to enlist three men who were her friends and relatives to pull off the hit at the Hilton, where Narcy and Ben would be hosting a convention for one of his company’s biggest clients, Amway.

“Unbeknownst to Ben Novack, his own wife and her team of co-conspirators were allegedly abut to conduct their own deadly business,” Bharara said in announcing the indictment of Narcy and her three alleged cohorts.

Ben would die in his fourth-floor suite.

He’d had a previous brush with death — and blamed her.

In June 2002, Ben claimed to cops that his wife had enlisted a half-dozen men to tie him to a leather chair and gag him at their Fort Lauderdale home, then made off with $1 million worth of his cash and valuables.

“I can have you killed any time I want,” Ben said his wife railed at him. “You’re not dead now because I stopped them.”

According to police reports, Narcy admitted to tying up Ben, but claimed it was part of a sex game.

She then gave cops an earful about his supposed penchant for kinky rituals, showing them dozens of photos from his porn collection, many depicting nude women with artificial limbs.

She also launched into a scurrilous countercampaign, telling cops Ben had broken her nose during an argument. She went to a plastic surgeon to get her schnoz fixed, she claimed, and woke up from surgery with breast implants she’d never asked for, according to police reports.

When Ben heard she was threatening to expose his lust for amputees and other intimate secrets, he declined to prosecute, according to cops. He filed for divorce instead, but canceled the action by month’s end.

Investigators are also probing the mysterious death, three months before her son was slain, of Ben’s mom, Bernice, found in her Fort Lauderdale home dead of what officials ruled “a series of falls.”

Indicted yesterday with Narcy were her brother, Cristobel Veliz; another relative, Denis Ramirez; and a friend, Joel Gonzalez.